Piezoelectric Drive Pulse Timing for Liquid Discharge Adaptability
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Solution Overview
Problem
Existing liquid discharge methods using piezoelectric elements are not compatible with rectangular wave-shaped drive pulses, and require adaptable drive pulses to accommodate varying recording conditions such as discharge amount, rate, and dot coverage.
Innovation Solution
A liquid discharge method and apparatus that apply a drive pulse with multiple potentials, where the time of the third potential varies based on acquired recording conditions, to the drive element, allowing for flexible discharge characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rectangular wave-shaped drive pulse is applied to a piezoelectric element, then the drive element can be controlled, but the discharge characteristics cannot be adapted to various recording conditions
Solution Approach 1:
The patent applies a three-stage drive pulse waveform that dynamically adjusts the timing of the third potential based on recording conditions. The drive pulse transitions from a fixed rectangular wave to a dynamic multi-stage waveform where the third potential timing varies to achieve different discharge characteristics (droplet size, discharge rate, coverage) suitable for various recording requirements
Solution Approach 2:
The patent changes the temporal parameters of the drive pulse by introducing a third potential stage with variable timing. By adjusting the timing duration of the third potential, the system can control discharge characteristics such as droplet size and discharge rate, enabling adaptation to different recording conditions without changing the basic pulse structure
2Manufacturing precision
If a fixed drive pulse is used, then the device complexity is low, but the discharge amount and rate cannot be adjusted for different recording conditions
Solution Approach 1:
The patent implements a dynamic drive pulse control system where the third potential timing is adjusted based on recording conditions. This enables precise control of discharge amount and rate by varying the timing parameter, allowing the system to adapt to different recording requirements while maintaining manageable control complexity through parameter variation rather than structural complexity
3Adaptability or versatility
If the third potential time is fixed, then the drive pulse is simple, but various discharge characteristics cannot be realized
Solution Approach 1:
The patent achieves various discharge characteristics by changing the timing parameter of the third potential in the drive pulse. By adjusting this single parameter (third potential time), the system can control droplet size, discharge rate, and coverage, enabling diverse discharge characteristics without complicating the overall pulse structure or control mechanism
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables realization of various discharge characteristics, improving dot formation on recording media by adapting to specific recording conditions through the dynamic adjustment of drive pulse parameters.
Implementation Method 1
when the drive element is a piezoelectric element
Data Source
AI summary
A liquid discharge method of discharging a liquid from a nozzle of a liquid discharge head by applying a drive pulse to a drive element of the liquid discharge head includes an acquisition step of acquiring a recording condition, and a driving step of applying the drive pulse to the drive element. The drive pulse includes a first potential, a second potential different from the first potential, and a third potential different from the first potential and the second potential. The second potential is to be applied after the first potential, and the third potential is to be applied after the second potential. In the liquid discharge method, in the driving step, the drive pulse in which a time of the third potential varies depending on the recording condition acquired in the acquisition step is applied to the drive element.